James j



(No Model.)

J. J. JOHNSTON.

DOOR BELL.

' Nd; 253,610; Patented Feb. 14,1882.

UNITED STATES PATENT OFFICE.

JAMES J. JOHNSTON, OF OOLUMBIANA, OHIO.

DOOR-BELL.

SPECIFICATION forming part of Letters Patent No. 253,610, dated February 14, 1882.

Application filed January 12, 188 2. (No model.) I

To all whom it may concern:

Be it known that I, JAMEs J. JOHNSTON, of

Columbiana, in the county of Oolumbiana and State of Ohio, have invented a certain new and useful Improvement in Door-Bells; and I do hereby declare that the followin g is a full, clear, and exact description thereof, reference being bad to the accompanying drawings, and to the letters of reference marked thereon.

My invention relates to an improvement in door-bells; and it consists in making the chamher for the operating-lever cylindrical and in two parts, with its outer wall furnished with screw-threads and its outer end with a square projection for turning the cylindrical chamber in the bore made'in the door-jamb for its reception; and in the combination, with the said cylindrical chamber, of an operating-lever furnished with adjustable inclines, a hammer pivoted to a disk having corresponding inclines, an operating-spring, and a detachable bell secured to a projection on said disk, the whole combined and arranged to cover said hammer, spring, and inner end of the operating-lever.

To enable others skilledin the art with which my invention is most nearly connected to make and use it, 1 will proceed to describe its con struction and operation.

In the accompanying drawings, which form I part of my specification, Figure 1 is a vertical section of a door-jamb furnished with myimproved door-bell, representing the bell, disk, inner end of the operating-lever and its adjustable inclines, and the washeron the outer end of the door-jamb. Fig. 2 represents a transverse section of the bell and a face view of the disk and hammer to which said belland hammer are attached. Fig.3represents one-halfof the cylindrical chamber for the operating-lever. Fig. 4 represents an end view of the cylindrical chamber when the two halves of said chamber are placed together. Fig. 5 is a side view of the operating-lever. Fig. 6 is a detail view.

In the accompan yingdrawin gs, A represents the door-jamb. B and B represent the cylindrical chamber for the operating-lever A, which chamber is constructed in two parts. The part B is furnished at each end with projections h, which fit into recesses g in the ends of the part B of said chamber, which chamber is divided into two con1partments,eand f, by means of a partition,i. The outer walls of the parts B and B of said chamber are furnished with screwthreadsj, which, when the parts B and-B are .united, form one continuous screw-thread around said'chamber. The outer end of the chamber is furnished with a square projection, (3, which has a square opening, D, through it for the reception ofthe square part 19 of the operating-lever. The partition ia'nd innerend of the parts B and B are furnished with semicircular recesses kand l,which, whenthe parts B and B are placed together, form a circular opening corresponding to the round portion 9 of the operating-lever A.

The operating-lever A is furnished with collars r and s and a detachable and adjustable piece, f,havinginclines. Theoperating-lever A on its outer end is furnished with an ordinary knob, h, for operating it. The disk n is secured by means of screws to the inner edge of the door-jamb, as indicated in Fig. 1. Said disk has two projections, to and 20. Upon the projection u is secured, by a screw, the bell 0, which is of ordinary construction. The barnmer as is pivoted at c on the end of the projection to, and is furnished with inclines e, which correspond to the inclinesf on the inner end of the operating-lever A, which is clearly in dieated in Fig. 6. The disk at has two projections, a b, forsupporting a rod, 70, upon which are springs d and l. The forked end y of the hammer 00 straddles the rod k, the spring cl being on one side of said fork yand the spring lon the other side. The spring a, being strongest, is employed for imparting the desired stroke of the hammer as against the bell, the spring Z being used for holding the hammer .00 back from the bell, as shown in Fig. 2. The disk nis furnished with an opening, m, for the passage of the inner end of the operating-lever A and the adj list-able and detachable piece f.

In hanging the bell the lever A is furnished with a spiral spring, t, as shown in Fig. 1. The 5 lever is then placed in one half of the cylindrical chamber, with the collar 8 and spiral spring t in the compartment 6 of said chamber and the collar 1' in the compartmentf, as shown in Fig.1. Then the two parts B and Bare placed together, as shown in Fig. 4. The operator then bores a suitable hole of proper diameter in the door-jamb for receiving the cylindrical chamber, which, being entered, is, by means of a wrench, placed upon the projecting square 0, secured in the door-jamb. 'A washer, g, is then placed on the projecting square-O, which is secured to the door-jamb by screws, as shown in Fig.1. The operating-lever A is then fornished with the operating-knob h. The disk at, furnished with the hammer w, rod 70, and springsd and Z, isthen secured to theinner ed ge of the door-jainb. The inner end of the operating-lever A is then furnished with the detachable and adjustable piecef, as shown in Figs. 1, 5, and 6. The bell 0 is then secured on the projection u of the disk n.

The operation of the bell is as follows: By pulling on the knob h, as indicated by the arrow in Fig. 1, one of the inclines of the piece f will act against one of the inclines ot' the piece 6, which will throw back the hammer a2, and the spring (I, acting upon the forked end 3 of the hammer, will cause it to strike a sudden blow on the side of the bell 0. The operator, releasing his pull upon the knob h, the spring t, acting against the collar 8, will throw back the operating-lever A, causing the other incline of the piece f to operate against the other incline of the piece 6 on the hammer av, thereby causing a second stroke of the hammer 00 upon the bell 0.

Having thus described my improvement, what I claim as of my invention is 1. In a door-bell, the cylindrical chamber B and B, made in two parts, having compartments 6 and f, partition 1', square projection O, projections h, and recesses g, with openings D, k, and l, the outer walls of said parts B and B furnished with screw-threads in combination with the operating lever A, having a square portion, 19, round portion 19, with collars rs, and spiral spring t, substantially as herein described, and for the purpose set forth.

2. In a door-bell, the combination of the cylindrical chamber, constructed in two parts, B and B, operating-lever A, having detachable and adjustable piece f, disk at, having projections 20 and a, hammer 00, having projections c, and springs d and l, and the bell 0, secured to the projection to of said disk, substantially as herein described, and for the purpose set forth.

JAMES J. JOHNSTON.

Witnesses:

A. O. JOHNSTON, J NO. W. STOCKETT. 

